My 2.5 year old seemingly healthy bunny became extremely sick overnight. He was eating and drinking but when I took him to vet he was very dehydrated and blood levels for sodium and other things extremely high. The vet is trying to figure out what exact bacterial infection could be the cause. We took him home and are administering IV fluids 2x a day, antibiotic, omega fatty supplement and 3x day critical care food supplement. Thank G-d he survived last night and looks a bit better today. He is eating and drinking. Does anybody experienced this with their bunny?!!